.top{
	height: 50px;width: 99%;float: left;border: solid 1px black;
}
.logo{
	float: left;line-height: 20px;
}
.userinfo{
	float: right;line-height: 50px;font-size: 13px;margin-right: 100px;
}
.center{
	width: 100%;float: left;height: 500px;
}
.center_left{
	width:10%;border: solid 1px black;height: 100%;float: left;
}
.center_content{
	width: 89%;border: solid 1px black;height: 100%;float: left;margin-left: -1px;
}